# Analog Circuits-BJT and MOSFET Amplifiers [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 1 - 4 of 97

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## Question 1

Appeared in Year: 2007

### Question MCQ▾

In the Op-Amp circuit shown, assume that the diode current follows the equation . For , , and for .

The relationship between and is

### Choices

Choice (4)Response

a.

b.

c.

d.

Edit

### Passage

Consider for CMOS circuit shown, where the gate voltage of the n-MOSFET is increased from zero, while the gate voltage of the p-MOSFET is kept constant at 3V. Assume, that, for both transistors, the magnitude of the threshold voltage is 1 V and the product of trans-conductance parameter is 1mA/

## Question 2 (1 of 2 Based on Passage)

Appeared in Year: 2009

### Question MCQ▾

For small increase in beyond 1V, which of the following gives the correct description of the region of operation of each MOSFET

### Choices

Choice (4)Response

a.

The MOSFETs are in saturation region

b.

n-MOSFETs is in triode and p-MOSFET is in saturation region

c.

The MOSFETs are in triode region

d.

n-MOSFET is in saturation and p-MOSFET is in triode region

Edit

## Question 3 (2 of 2 Based on Passage)

Appeared in Year: 2009

### Question MCQ▾

Estimate the output voltage for [Hints: Use the appropriate current-voltage equation for each MOSFET, based on the answer to Q. 4.16]

### Choices

Choice (4)Response

a.

b.

c.

d.

Edit

## Question 4

Appeared in Year: 2013

### Question MCQ▾

In the circuit shown below what is the output voltage () if a silicon transistor Q and an ideal op-amp are used?

### Choices

Choice (4)Response

a.

+ 15 V

b.

+ 0.7 V

c.

-15 V

d.

-0.7 V

Edit